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Finding the Fourth Proportional to 2,117.70, 3,158.51 and 2,080.76

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Solution

The fourth proportional to 2,117.70, 3,158.51 and 2,080.76 is: 3,103.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.70 : 3,158.51 = 2,080.76 : x
  2. Step 2: Convert to fraction form
    2,117.70/3,158.51 = 2,080.76/x
  3. Step 3: Cross multiply
    2,117.70x = 3,158.51 × 2,080.76
  4. Step 4: Simplify right side
    2,117.70x = 6,572,075.07
  5. Step 5: Solve for x
    x = 6,572,075.07/2,117.70
  6. Step 6: Final answer
    x = 3,103.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.